Time: 900 PM Thu June 20, 2024 Forecaster: Aaron O'Brien ------------------------- Internal Message Status Flash Flood Prediction Program ------------------------- MESSAGE 1’S WILL BE ALLOWED TO EXPIRE AT 10:00 PM Message 1’s will be allowed to expire at 10:00pm as the threat of heavy rain has come to an end. Any additional rainfall that may occur overnight will remain weak and uneventful. Storm motions continue to be southwest to northeast at 15-20 mph limiting point rainfall amounts. Atmospheric conditions will remain capped through the overnight hours, supporting little to no additional chances for precipitation. Overnight lows will drop to the low 60s to upper 50s for the plains and mid to low 50s for the foothills. STORM RAINFALL POTENTIAL AND DURATION: Heavy rainfall is not expected for the remainder of the evening and during the overnight hours. WORST CASE SCENARIO: In the event of an isolated shower or thunderstorm develops, 0.10”-0.30” total is possible in 10-30 minutes. COUNTY MESSAGE VALID TIMES PRIME TIME Boulder County 1 Current TO 1000 PM Current TO 900 PM Jefferson County 1 Current TO 1000 PM Current TO 900 PM Broomfield County 1 Current TO 1000 PM Current TO 900 PM Douglas County 1 Current TO 1000 PM Current TO 900 PM Adams County 1 Current TO 1000 PM Current TO 900 PM Denver County 1 Current TO 1000 PM Current TO 900 PM DIA 1 Current TO 1000 PM Current TO 900 PM Arapahoe County 1 Current TO 1000 PM Current TO 900 PM the City of Aurora 1 Current TO 1000 PM Current TO 900 PM Arvada 1 Current TO 1000 PM Current TO 900 PM Wheat Ridge 1 Current TO 1000 PM Current TO 900 PM Lakewood 1 Current TO 1000 PM Current TO 900 PM County-specific Quantitative Precipitation Outlook PRECIPITATION TIME 30-Minute Rainfall and % Probability Message Potential Plains       Adams Current TO 1100 PM THU Trace (25%) to 0.1" (10%) to 0.3" (5%) ISSUED Arapahoe Current TO 1100 PM THU Trace (25%) to 0.1" (10%) to 0.3" (5%) ISSUED Boulder Current TO 1100 PM THU Trace (25%) to 0.1" (10%) to 0.3" (5%) ISSUED Broomfield Current TO 1100 PM THU Trace (25%) to 0.1" (10%) to 0.3" (5%) ISSUED Denver Current TO 1100 PM THU Trace (25%) to 0.1" (10%) to 0.3" (5%) ISSUED Douglas Current TO 1100 PM THU Trace (25%) to 0.1" (10%) to 0.3" (5%) ISSUED Jefferson Current TO 1100 PM THU Trace (25%) to 0.1" (10%) to 0.3" (5%) ISSUED Foothills above 6500ft       Boulder Current TO 1100 PM THU Trace (25%) to 0.1" (10%) to 0.3" (5%) ISSUED Douglas Current TO 1100 PM THU Trace (25%) to 0.1" (10%) to 0.3" (5%) ISSUED Jefferson Current TO 1100 PM THU Trace (25%) to 0.1" (10%) to 0.3" (5%) ISSUED MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS. MHFD Flood Prediction Center: 303-458-0789    F2P2 Website [http://udfcd.org/Flash+Flood+Prediction+Program]